package com.maimang.platform.aspect;

import com.maimang.platform.annotation.DataSource;
import com.maimang.platform.datasource.DynamicDataSourceContextHolder;
import com.maimang.platform.enums.DataSourceType;
import com.maimang.platform.lang.StringUtils;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;

/**
 * 多数据源切面处理类
 *
 * @author Rocky
 */
@Aspect
@Order(-5)
@Component
public class DataSourceAspect {
	protected Logger logger = LoggerFactory.getLogger(getClass());

	@Pointcut("@annotation(com.maimang.platform.annotation.DataSource)")
	public void dsPointCut() {

	}

	@Around("dsPointCut() && @annotation(ds)")
	public Object around(ProceedingJoinPoint point, DataSource ds) throws Throwable {
		MethodSignature signature = (MethodSignature) point.getSignature();

		Method method = signature.getMethod();

		DataSource dataSource = method.getAnnotation(DataSource.class);

		if (StringUtils.isNotNull(dataSource)) {
			DynamicDataSourceContextHolder.setDateSoureType(dataSource.value());
		} else {
			DynamicDataSourceContextHolder.setDateSoureType(DataSourceType.MASTER);
		}

		try {
			return point.proceed();
		} finally {
			// 销毁数据源 在执行方法之后
			DynamicDataSourceContextHolder.clearDateSoureType();
		}
	}
}
